Thrashing and separating machine



(No Modl.) 2 Sheets-Sheet 1.

F. STROBEL.

QHRASHING AND SEPARATING MACHINE. N0. 340,8 Patented Apr. 27, 1886.

VENT R l I I 3 .1125 neg 6 N. PETERS. Phnlo-Lilhogmphrr. Wtlihinginn. D. 0.

(No Model.) 2 Sheets-Sheet 2.

F. STROBEL. THRASHING AND SEPARATING MACHINE. I

No. 340,899. Patented Apr. 27, 1886.

WITNESSES N PETERS. PhomLilhogl-ufiler. Wnhinglon, v.0

UNITED STATES PATENT OFFICE.

FREDERICK STROBEL, OF MARION, OHIO.

THRASHING AND SEPARATING MACHINE.

SPEQIPTZCATION forming part of Letters Patent No. 340,899, dated April 27, 1886. Application filed December 10, 1885. Serial No. 185,232. (No model.)

To ctZZ whom it may concern.-

Be it known that I, FREDERICK STROBEL, a citizen of the United States, and aresident of Marion, in the county of Marion and State of Ohio, have invented certain new and useful Improvements in Thrashing and Separating Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a longitudinal vertical sectional View of my improved tlnashing-machine and separator. Fig. 2 is a top View of the crankshaft operating the racks, grain-pan, and bottom for the rear rack; and Fig. 3 is a perspective detail view of the grate at the rear of the thrashing-cylinder.

Similar letters of reference indicate corresponding parts in all the figures.

My invention'has relation to thrashing-machines and grainseparators; and it consists in the improved construction and combination of parts of the same, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates the casing, which is formed with the necessary bearings for the several shafts of the machine.

B is the thrashirig-cylinder, which operates against the concave C, and which maybe of any desired construction, as well as the concave.

.T) indicates a rearwardly and upwardly curved grate, which extends from the rear edge of the concave to apoint above the horizontal plane of the axis of the cylinder 13, the

the grain as it is thrashed out of the straw, carrying it to the fanning and cleaning apparatus, which will be described later. i The forward rack, J, is supported at its forward end upon pivoted arms K, and extends with its forward end toward the rear edge of the grate, and the casing is at that point formed with a bulged chute, L, or so-called camel-back, up into which the straw is forced from the cylinder by means of the grate, and from which the straw falls upon the forward end of the forward rack. The bottom of the forward rack is formed by a number of forwardly-in clined slats, M, having sufficient space between their edges to allow grain to drop between them, and the rear portion of the rack is provided with a number of upright teeth, N, which assist in forwarding the straw toward the rear end of the machine. The rear end of the forward rack is supported by means of upright posts 0, the lower ends of which rest upon pitrnen P, the forward ends of which are secured to the forward end of the rack, while their rear ends are pivoted to the main crankshaft Q, which will be more fully described. The rear rack, R, is supported at its rear upwardly-inclined end by pivoted arms S, and has its forward end provided with arms T, pivoted to the crank-shaft, and the forward portion of this rack is provided with upright teeth U, while its bottom is composed of forwardly inclined transverse slats V. The crank-shaft is formed with two double cranks, \V W, to which the arms of the rear rack are pivoted, and inside of these cranks the shaft is formed with two larger cranks, X X, and two smaller cranks, Y Y, formed by bending the shafts into steps, to which cranks respectively the pitmen of the forward rack and the pitmen Z Z, secured at their forward ends to the pan, are pivoted, the stepped cranks being diametrically opposite to the cranks for the rear rack. A bottom or plate, A, is supported at its rear end upon pivoted arms B, and at its forward end by levers or arms 0, pivoted at or near their middles, and having their upper ends pivoted to the bottom and their lower ends pivoted to pitmen D, pivoted to the rear end of the grain-pan,-the bottom being parallel with the rear rack, and consequently upwardly inclined toward its rear end. A so-called chaffer or screen, E, is connected at its forward end to the rear end of the grain-pan, and is pivoted at its rear end to pivoted arms F, which support it, and this screen consists of side pieces, G, to the lower edges of which are secured transverse rearwardly-inclined cross-slats H, which are connected by means of serrated longitudinal strips 1. The rear end of the screen is curved slightly downward, and the crossslats are placed at such an incline as to be parallel to the direction of the blast coming from the revolvingfan J, the upper and lower walls of the mouth or spring of the fan-chamber being inclined upward, so as to throw the entire blast up against and through the said parallel slats. The riddles K, which furthermore clean the thrashed grain, are secured in the shoe L below the curved screen, to which the shoe is preferably secured, so that the entire shoe is shaken with the screen. It will now be seen that as the grain is fed to the thrashing-cylinder the thrashed grain will drop through the concave and through the grate down upon the pan, the downwardlydepending apron deiieetin g the grain flying out through the grate, and the straw will be forced upward by the grate toward the camel back, from which it will drop down upon the forward shakingrack. This upward movement of the straw will cause it to drop a large quantity of the thrashed grain before falling upon the rack, and thus insures a more perfect separation of the grain, the grate taking the place of the usual heaters or similar devices for separating the thrashed grain from the straw before it passes upon the racks, and for preventing too much straw from falling upon the rack, and thus choking the same, the grate preventing the straw from passing onto the rack until after it has passed up onto the camel-back. The straw is shaken upon the forward rack, and the thrashed grain, which is carried over with the straw, falls through the slats of the rack down upon the pan, and the strawpasses from the forward rack over upon the rear rack, which furthermore shakes the straw and carries it toward the rear or discharge end of the machine. The grain which falls from the rear rack falls upon theinclined bottom,which carries it down upon the grain-pan,and the straw falling from the rear end of the rear rack falls down upon an extension, M, secured to the rear end of the inclined bottom, from which it again either falls to the ground and is carried away or is carried away by a straw-carrier. The thrashed grain containing chaff, short straw, broken heads, and other articles to be cleaned from the grain passes from the grain-pan to the screen at the rear end of the same, and the cross-slats of this screen'being placed parallel to the direction of the blast from the fan the blast will strike the chaff and other impurities directly and blow them away, the rear end of the screen being curved so as to place that portion more pan.

directly in the way of the blast, which at that point is weaker than closer to the fan. The inclined cross-slats and the serrated longitudinal strips will feed all the impurities toward the rear edge of the screen, and the cleaned grain will fall down upon the riddles, where it will be furthermore cleaned and screened, being discharged in the usual manner. The

arms or pitmen of the racks being pivoted to the larger cranks, while the arms or pitmen of the grain-pan are pivoted to the smaller cranks, the racks will receiveza more vigorous shakingthan the grain-pan, which is more gently rocked forward and back, and the inclined bottom under the rear rack rocks with the grain-pan, together with the Screen above the shoe, all the rocking parts of the machine receiving their motion from the crank-shaft, which preferably receives its motion from the cylinder-shaft, which likewise gives motion to the fan, the shafts-of the cylinder and of the fan and the crank-shaft being the only revolving shafts, so that only two belts besides the belt carrying motion from the motor to the cylinder-shaft are necessary. This simplifies the construction of the machine and renders its action more positive, there being less danger of parts of the machine stopping work on account of a belt slipping off, the few belts requiring very little attention. The extension at the rear end of the inclined bottom consists of a number of teeth, and serves to deliver the straw at the rear end of the machine, and at the same time it gives the straw a final shake, which will liberate any grain yet remaining in the straw and allow it to drop between the teeth or fingers and to slide down upon the inclined bottom to the grain- The upright posts supporting the rear end of the forward rack raises the said'end and the teeth 1111011 the rear end of the forward rack and upon the forward portion of the rear rack serves to increase the ease in feeding the straw, and at the same time to loosen it, and thus cause it to part more readily with the thrashed grain.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States- 1. In athrashiug-machine, the combination, with the thrashing cylinder and concave, of a rearwardly and upwardly curved grate extending from the rear edge of the concave to a point above the horizontal plane of the axis of the cylinder, and a substantially vertical deflector secured to the upper edge of the grate and facing the cylinder-discharge, as and for the purpose shown and set forth.

2. In a thrashing-machine, the combination of a casing having a bulge in its top to the rear of the cylinder, the cylinder and concave, a grate curved rearward and upward from the rear edge of the concave to a point above the horizontal plane of the axis of the cylinder, a substantially vertical deflector suspended from the upper edge of the grate and facing the cylinder-discharge, and a shaker to pitmen or arms pivotally connecting it with the rear of the grate, as and for the purpose the outer cranks, and a grain-pan having arms shown and set forth. pivoted to the smaller cranks, as and for the 3. In a thrashing-machine and separator, purpose shown and set forth. I 5 5 the combination, with a crank-shaft having In testimony that I claim the foregoing as two double cranks at the ends and formed with my own I have hereunto affixed my signature two pairs of stepped cranks diametrically opin presence of two witnesses.

posite to them, the said stepped cranks form- FREDERICK STROBEL. ing each a larger and a shorter crank, of a for- XVitnesses: IO ward rack, pitnien pivotally connecting it with l J. E. DAVIDS,

JOHN HORTON.

the larger of the stepped cranks, a rear rack, 

